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P. G. BOTSPORD.

STEAM TRAP. No 381,670. Patented Apr. 24, 1888.

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FREDERICK G. BOISFORD, OF ERIE, PENNSYLVANIA, ASSIGNOB, BY MESNEASSIGNMENTS, TO THE ERIE CAR HEATING COMPANY, OF SAME PLACE.

STEAM-TRAP.

SPECIFICATION forming part of Letters Patent No. 381.670, dated April24, 1888.

Applicatitn filed April 23, 1887.

To aZZ whom it may concern:

Be it known that I, FREDERICK G. BoTs- Fonn, a citizen of the UnitedStates, residing at Erie, in the county of Erie and State ofPennsylvania, have invented a certain new and useful Improvement inSteanrTraps; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, forming partof this specification. I5 Myinvention consists in the improvement in steam-traps hereinafter setforth in the specification and claims, and illustrated in theaccompanying drawings, in which Figure I shows a view of my improved 2osteam trap in elevation, with sections of the shell broken away at theends, showing the interior thereof. Fig. 2 shows a perspective View ofthe adjustable valvescat mechanism thereof. Like letters or figuresrefer to like parts in both figures.

This trap V, I construct preferably as follows, viz: The body 1 of thetrap I make in the form of a hollow cylinder, the central portion ofwhich I make of somewhat larger diameter than the ends thereof. In theends of this cylinder I screw bushings 2 and 6. In the bushing 2, in theend 3 of the body 1, Iscrew a pipe, 5, of brass or other metal capableof a considerable degree of expansion when heat is applied thereto. Thistube or pipe 5 is. open at both ends and extends through the centralpart of the trapbody 1 into the end of the bushing 6, the openingthrough the cenao ter of this bushing being larger than the outsidediameter of the end of the pipe 5. On the inner end of the bushing 6 areinwardlyprojecting lugs 7, between which the end of the pipe operatesand which act as guides therefor. From the lugs 7 to the outer endthereof the opening in the bushing Gis screwthreaded to fit thescrew-thread on the valve plug 8, Fig. 2, which fits therein. The innercape of water from the trap.

Serial No. 235,927. (No model.)

end of the valve plug 8, forming a hollow or annular valve seat, isprovided with a gasket, 9, of suitable steam-packing, against which thefree end of the pipe 5 operates to close the trap by the longitudinalexpansion thereof. Through the center of the hollow valve seat and plug8 there is an opening, 11, which extends from end to end thereof, sothat when in place there is a continuous opening through the bushing 2,the pipe 5, and the valve seat and plug 8, for the circulation of air tofacilitate the speedy cooling of the pipe 5. In the central part of thevalve-plug 8 I make two or more radial slots, 10, which communicate withthe central opening, 11, therein, which openings 10 extend beyond theend of the bushing 6 when the valve-plug 8 is in place, so as to leaveabundant openings for the es- On the out side of the outer end of thevalve-plug 8 I place a jam nut, 12, which I screw up against the outerend of the bushing 6, when the valve-plng 8 is properly adjusted, toprevent its being moved out of place. In the central part of the upperside of the trap-body l I make an inletopening, into which a nipple,

13, is secured for connecting the trap V with a steampipe conveyingsteam thereto.

Having thus fully described my improvement, so as to enable others toconstruct and operate the saine,what I claim as new, and desire tosccure'by Letters Patent of the United States, is

1. The combination, in a steanrtrap, of a tubular body adapted to retainsteam and water, having an expansion-tube secured in one end thereof,with an annular or hollow valve seat secured in the opposite end of saidbody, against which the open end of said expansiontnbe operates, so thatthe air will circulate entirely through said expansion tube andValve-seat, substantially as and for the puro pose set forth.

2. The COIllblIlZthlOl],'lll a steam-trap, of a hollow tubular bodyhaving a bushing, 2, in one end thereof, into which bushing anexpansion-pipe, 5, is secured,with a bushing, 6, hav- 5 ing guides 7therein, and the adjustablevalve- 2 ammo I plug 8, substantially as andfor the purpose In testimony whereof I affix my signature in set forth.presence of two witnesses.

3. The combination, in. a steam-trap for carheating, of a hollow tubularbody having a FREDERICK G. BOTSFORD. 5 tubular expansion-pipe, 5,secured therein,

with the hollow adjustable valve-plug 8, con- Witnesses: structedsubstantially as shown, and for the W. W. SIMPSON, 4 purpose set forth.H. J CURTZE.

